Question

10) If a gas sample is heated, which change is expected?

a. Volume would increase.

b. Volume would decrease.

c. Volume is a fixed quantity; it cannot change.

d. The initial and final temperature does not affect volume.

11) If the pressure of a liquid was 600. mmHg, what is its pressure in torr?

12) In a gas, the particles

a. are close to each other.

b. are moving rapidly.

c. attract or repel.

d. All of these statements are true.

13) Suppose we take a 4.0 liter sample of a gas at 1.0 atm and increase the temperature from 22 C to100 C. What will the final pressure be if the volume does not change?

17) What is true about gases when the temperature increases?

a. The gas molecules collide with the walls of the container with more force.

b. The gas molecules move faster.

c. Gas particles hit the walls of the container more often.

d. All of these statements are true.

18) Which statement is incorrect when considering gases?

a. Gas molecules are not in motion at room temperature.

b. The pressure of a gas increases when the gas particles collide with the walls of the

chamber with more force.

c. A reason why molecules of a gas fill a container is that there is no attraction between the

molecules of the gas.

d. Statements 1 and 2 are both false.

19) Which statement is true?

a. When pressure increases, volume increases.

b. When temperature increases, volume increases.

c. When temperature increases, pressure decreases.

d. When the number of moles of gas increases, the pressure decreases.

20) What mass of neon has a volume of 56.0 L at STP?

Answer 1

Answer:-

(10) If gas sample is heated volume would be increased because we know that according to the Charles' Law " at constant pressure the volume of ideal gas is directly proportional to the absolute temperature i.e heat.

volume of ideal gas(V) = k(T)

where k = constant

T =  absolute temperature (in Kelvin)

therefore correct option is'a'

(11) As we know that

1 mmHg = 1 Torr

then

pressure of liquid = 600 mmHg = 600 Torr

pressure of liquid = 600 Torr ( i.e the answer)

(12) in gas, the particles of gas moving rapidly because of their brownian motion of gas particles.

therefore correct option is 'b'

(13) Given:-

Pressure(P₁) = 1.0 atm

Volume(V₁) = 4.0 liter

Temperature(T₁) = 22 ⁰C = 273 + 22 = 295 K

Pressure(P₂) = ?

Volume(V₂) = 4.0 liter

Temperature(T₂) = 100⁰C = 273 + 100 = 373 K

As we know that according to the formula

P₁V₁ / T₁ =  P₂V₂ / T₂

1.0 4.0 / 295 = P₂ 4.0 / 373

1.0 / 295 = P₂ / 373

P₂ = 1.0 373 / 295

P₂ = 373 / 295

P₂ = 1.2644 atm (i.e the answer)

(17)When the temperature increases , the knetic energy of the gas molecules increases due to which gas molecules collide with the walls of the container with more force. and this stage the gas molecules move faster.The gas particles hit the walls of the container more often.

therefore correct option is 'd'; i.e all staements are true.

18) The following statement is incorrect about considering gases i.e gas molecules are not in motion at room temperature.because gas molecules are always in random motion at all temperature. therefore correct option is 'a'

19) The correct true statement is that when temperature increases, volume increases , because we know that Charles' Law " at constant pressure the volume of ideal gas is directly proportional to the absolute temperature

volume of ideal gas(V) = k(T)

therefore correct option is 'b'

(20) As we know that

At STP

22.4 liter volume of neon(Ne) = 20.17 g Ne

1.0 liter volume of neon(Ne) = 20.17 /22.4 g Ne

1.0 liter volume of neon(Ne) = 0.9004 g Ne

then

56.0 liter  volume of neon(Ne) = 0.9004 56.0 g Ne

56.0 liter  volume of neon(Ne) = 50.4224 g Ne (i.e the answer)